WO2015167182A1 - Procédé et appareil de remise d'un rapport d'informations d'état de canal - Google Patents

Procédé et appareil de remise d'un rapport d'informations d'état de canal Download PDF

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Publication number
WO2015167182A1
WO2015167182A1 PCT/KR2015/004159 KR2015004159W WO2015167182A1 WO 2015167182 A1 WO2015167182 A1 WO 2015167182A1 KR 2015004159 W KR2015004159 W KR 2015004159W WO 2015167182 A1 WO2015167182 A1 WO 2015167182A1
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Prior art keywords
csi
report
csi report
priority
frequency band
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PCT/KR2015/004159
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English (en)
Inventor
Yunchuan YANG
Yingyang Li
Shichang Zhang
Chengjun Sun
Jingxing Fu
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Samsung Electronics Co., Ltd.
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Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Priority to US15/307,602 priority Critical patent/US10848999B2/en
Publication of WO2015167182A1 publication Critical patent/WO2015167182A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/003—Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present invention relates to a mobile communication technology field, and more particularly, to a method and apparatus for reporting channel state information (CSI).
  • CSI channel state information
  • a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode are widely adopted.
  • FDD mode different frequency resources are respectively used for uplink communication and downlink communication.
  • TDD mode a same frequency resource is shared for both the uplink communication and the downlinkcommunication, and the uplink communication and the downlink communication are respectively performed by dividing time domain.
  • a 3GPP Long Term Evolution (LTE) system can support both the FDD mode and the TDD mode.
  • Radio frame structures include a frame structure for the FDD mode and a frame structure for the TDD mode.
  • the frame structure for the FDD mode is as shown in FIG. 1.
  • a 10ms radio frame includes twenty 0.5ms time slots respectively numbered from 0 to 19.
  • a 1ms subframeiwith includes time slots 2i and 2i+1. Communication in uplink and downlink isrespectively performed on the different frequency resources.
  • a frame structure for the TDD mode is as shown in FIG. 2.
  • a 10ms radio frame includes two 5ms half frames. Each half frame includes eight 0.5ms time slots and three specific fields.
  • the three specific fields include a downlink pilot time slot (DwPTS), a guard period (GP) and an uplink pilot time slot (UpPTS).
  • DwPTS downlink pilot time slot
  • GP guard period
  • UpPTS uplink pilot time slot
  • a length of each of the three specific fields is 1ms.
  • a subframei in the frame structure for the TDD mode, a subframeiincludes time slots 2i and 2i+1. A same frequency resource is shared by the downlink and uplink. Communication in uplink and downlink isrespectively in different subframes.
  • D indicates a downlink subframe
  • U indicates an uplink subframe
  • S indicates a specific frame including one of the three specific fields.
  • frequency resources to perform communication for user equipments are symmetrical.
  • uplink resources and downlink resources are always available.
  • a UE can feed an uplink control signaling in time, e.g., aAcknowledge/Non-Acknowledge(ACK/NACK) and CSI in a Hybrid Automatic Retransmission Request(HARQ).
  • HARQ Hybrid Automatic Retransmission Request
  • uplink and downlink of the communication services is more and more asymmetric.
  • Some aspects cause the asymmetry of the communication services, which are related with natures of the communication services.
  • a network video service, a downloading service and a browsing service provided for the LTE system increases downlink traffic.
  • a social network service or a point-to-point (P2P) service provided for the LTE system increase uplink traffic.
  • P2P point-to-point
  • the TDD mode and FDD mode may be flexibly adopted for different scenarios so as to improve spectrum efficiency and system performance.
  • a possible mixed structure includes that in the LTE FDD system, a part of uplink subframes or uplink resources of an uplink frequency band are occupied by downlink subframes, or are occupied by services of another non-cellular communication.
  • D2D Device to Device
  • the D2D communication covered by a LTE FDD cell occupies the uplink resource, i.e., an uplink carrier in the FDD cell is a uplink subframe of a TDD cell.
  • the uplink frequency band of the FDD mode can adopt an uplink-downlink configurationsimilar as that in the LTE TDD system, or can adopt a re-defined uplink-downlink configuration.
  • an uplink-downlink configuration in the uplink frequency band of the FDD mode is adjusted via a dynamic signaling, a proportion of uplink subframes and downlink subframes can satisfy current uplink traffic and downlink traffic so as to improve uplink peak rate and downlink peak rate of UEs and to improve system throughput.
  • a UE can obtain CSI according to a downlink reference signal, and then feeds the obtained CSI back to an eNB.
  • the eNB determines a modulation-coding way and a location of a physical resource transmitted to the UE, and a transmission mode etc.
  • A-CSI report includes a process that an eNB triggers a UE to feed CSI back on a Physical Uplink Shared Channel (PUSCH) once via a triggering signaling.
  • PUSCH Physical Uplink Shared Channel
  • a reporting condition includes that the UE receives a Downlink Control Indicator (DCI) format 0 on a downlink subframe or a random access response admission.
  • DCI Downlink Control Indicator
  • a Channel Quality Indicator (CQI) request in the DCI format 0 may be configured with one of "01", "10" and "11” respectively corresponding to conditions that the UE works in a single-cell scenario and is configured with one of transmission modes 1-9, the UE works in a single-cell scenario and is configured with a transmission mode 10, and the UE works in a multiple-cell scenario and is configured with one of transmission modes 1-9.
  • CQI Channel Quality Indicator
  • the UE transmits the A-CSI report on a PUSCH scheduled through the DCI format 0.
  • the P-CSI report includes according to eNB configuration of the eNB, the UE periodically feeds the CSI back on a Physical Uplink Control Channel (PUCCH).
  • PUCCH Physical Uplink Control Channel
  • the UE transmits the CSI on the PUCCH in the subframe, and on a subframe that the PUSCH is transmitted by the UE, the UE transmits the CSI on the PUSCH in the subframe.
  • a period and a location offset in the period of the P-CSI report is determined by a system high layer configuration.
  • the high layer configures a parameter cqi-pmi-ConfigIndex for the UE.
  • the UE determines a subframe location of the CSI report by looking up a list.
  • a reporting period supported by the LTE FDD system includes2/5/10/20/40/80/160.
  • the reporting period supported by the LTE FDD system includes32/64/128.
  • the reporting period supported by the LTE TDD system includes1/5/10/20/40/80/160.
  • each downlink subframe corresponds to an uplink subframe.
  • a corresponding relationship to the downlink subframe and the uplink subframe is pre-configured, and is notified to the UE by the eNB, i.e., an uplink scheduling timing relationship including an ACK/NACK feedback and a CSI report.
  • the uplink scheduling timing relationship relates to uplink-downlink configuration of a cellular cell. It is assumed that UE receives the PDCCH on a downlink subframen, the PDCCH controls an uplink subframen+k, wherein a value of the k is defined in Table 2.
  • downlink transmission can be performed on the downlink frequency band of the FDD mode and the part of the uplink subframes that are on the uplink frequency band and are used as the downlink band.
  • only one uplink frequency band can be scheduled to report the CSI of a corresponding frequency band, wherein the CSI is used for the eNB to perform scheduling of the downlink transmission.
  • a method for report CSI is provided according to an embodiment of the present invention so as to ensure in a condition that a part of uplink subframes in an uplink frequency band is occupied, transmission of a CSI report of the UE is not impact.
  • An apparatus for report CSI is provided according to an embodiment of the present invention so as to ensure in a condition that a part of uplink subframes in an uplink frequency band is occupied, transmission of a CSI report of the UE is not impact.
  • a method for reporting channel state information (CSI) includes:
  • UE user equipment
  • a method for reporting CSI includes:
  • eNB evolved Node Base station
  • An apparatus for report CSI includes:
  • an analyzing module to analyze the information of the CSI report, and determine a frequency band of the CSI report, a report type of the CSI report, a report mode of the CSI report, a CSI process of the CSI report, a combination of at least one in a CSI subframe set and/or cells, and a report way of the CSI report.
  • An apparatus for reporting CSI includes:
  • a configuration module to configure information of a CSI report
  • atransmitting module to transmit the configured information of the CSI report.
  • a UE receives information of a CSI report, analyzes the information of the CSI report, and determines a frequency band of the CSI report, a report type of the CSI report, a report mode of the CSI report, a CSI process of the CSI report, a combination of at least one in a CSI subframe set and/or cells, and a report way of the CSI report.
  • transmission of a CSI report of the UE is not impact.
  • FIG. 1 is a schematic diagram illustrating a frame structure of a FDD mode in the prior art
  • FIG. 2 is a schematic diagram illustrating a frame structure of a TDD mode in the prior art
  • FIG. 3 is a flowchart illustrating a method for reporting CSI according to an embodiment of the present invention
  • FIG. 4 is a flowchart illustrating a method that an eNB transmits information of a CSI report according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram illustrating a structure of a UEaccording to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram illustrating a structure of an eNB according to an embodiment of the present invention.
  • FIG. 7 is a flowchart illustrating a method for selecting a frequency band to perform an A-CSI report according to an embodiment of the present invention
  • FIG. 8 is a flowchart illustrating a method for selecting a part of a CSI report in a frequency band when an A-CSI report is performed according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram illustrating a structure of a configuration of uplink timing slots and downlink timing slots according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram illustrating a first structure of a configuration of of uplink timing slots and downlink timing slots in a FDD uplink frequency band according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram illustrating a second structure of a configuration of uplink timing slots and downlink timing slots in a FDD uplink frequency band according to an embodiment of the present invention.
  • a flexible duplex communication is introduced. For example, a part of uplink subframes in an uplink frequency band of a LTE FDD system is used to transmit downlink subframes.
  • the LTE FDD system may receive downlink transmission from the two frequency bands, thus, the LTE FDD system is referred to as a flexible LTE FDD system.
  • the UE performs a CSI report on an uplink frequency band.
  • the UE performs the CSI report including an A-CSI report and a P-CSI report.
  • the method applies to a scenariothat in a frequency division duplex (FDD) system, a part of uplink subframes in a downlink frequency band and/or an uplink frequency band is changed to downlink subframes for data transmission, and a CSI report is performed on an uplink frequency band.
  • FDD frequency division duplex
  • FIG. 3 is a flowchart illustrating a method for reporting CSI according to an embodiment of the present invention. The method includes procedures as follows.
  • a UE receives information of a CSI report.
  • the information of the CSI report is carried in at least one of an uplink scheduling request (UL-grant), an information field of the UI-grant, a PDCCH message of scheduling a PUSCH, a configuration message, a physical layer signaling and a RRC layer signaling.
  • UL-grant uplink scheduling request
  • information field of the UI-grant a PDCCH message of scheduling a PUSCH
  • configuration message a physical layer signaling and a RRC layer signaling.
  • the information of the CSI report includes at least one of a frequency band of the CSI report, a report type of the CSI report, a report modeof the CSI report, a CSI process of the CSI report, a cell carrier of the CSI report, a CSI subframe set, a reporting way of the CSI report, a configuration message.
  • the report way of the CSI report is the P-CSI report
  • the information of the CSI report further includes a report period and a report offset.
  • the information of the CSI report may be transmitted via the configuration message or the physical layer signaling.
  • the configuration message and the physical layer signaling may further include the frequency band of the CSI report in the information of the CSI report and/or a priority rule.
  • the RRC layer signaling may further include the frequency band of the CSI report in the information of the CSI report and/or a priority rule.
  • the UE analyzes the information of the CSI report information, and determines the frequency band corresponding toof the CSI report, the report type of the CSI report, the report mode of the CSI report, the CSI process corresponding toof the CSI report and a combination of at least one in the CSI subframe set of the CSI report and/or cells, and a reporting way of the CSI report.
  • the UE may determine whether the A-CSI report is triggered and the frequency band of the CSI report according to the UI-grant.
  • the UE may further determine the frequency band on which the A-CSI report is triggered according to the information field of the uplink scheduling request UL-grant.
  • the UE may determine whether the A-CSI report is triggered and may determine the frequency band of the CSI. According to the configuration message, the UE may determine that the report way of the CSI report is the A-CSI report.
  • the UE may further determine the frequency band of the CSI report by analyzing the physical layer signaling or the configuration message.
  • the UE may further determine that the report way of the CSI report is the P-CSI report, and may further determine the report period and the report offset.
  • the P-CSI report When the P-CSI report is performed, the P-CSI report is carried on the PUCCH. When the A-CSI report is performed, the A-CSI report is carried on the PUSCH. When both the P-CSI report and the A-CSI are performed at the same time, the P-CSI report and the A-CSI report are carried on the PUCCH at the same time.
  • FIG. 4 is a flowchart illustrating a method that an eNB transmits information of a CSI report according to an embodiment of the present invention.
  • the method includes procedures as follows.
  • an eNB configures information of a CSI report.
  • the eNB transmits the configured information of the CSI report.
  • the information of the CSI report is carried in at least one of a UL-grant, an information field of the UI-grant, a PDCCH message of scheduling a PUSCH, a configuration message, a physical layer signaling and a RRC layer signaling.
  • FIG. 5 is a schematic diagram illustrating a structure of a UEaccording to an embodiment of the present invention.
  • the UE includes a receiving module and an analyzing module.
  • the receiving module is to receive information of a CSI report.
  • the information of the CSI report is carried in at least one of a UL-grant, an information field of the UI-grant, a PDCCH message of scheduling a PUSCH, a configuration message, a physical layer signaling and a RRC layer signaling.
  • the analyzing module is to analyze the information of the CSI report, and determine a frequency band of the CSI report, a report type of the CSI report, a report mode of the CSI report, a CSI process of the CSI report, a combination of at least one in a CSI subframe set and/or cells, and a report way of the CSI report.
  • FIG. 6 is a schematic diagram illustrating a structure of an eNB according to an embodiment of the present invention.
  • the eNB includes a configuration module and a transmitting module.
  • the configuration module is to configure information of a CSI report.
  • the transmitting module is to carry the information of the CSI report in at least one of a UL-grant, an information field of the UI-grant, a PDCCH message of scheduling a PUSCH, a configuration message, a physical layer signaling and a RRC layer signaling.
  • a frequency band in information of the CSI report and configuration such as a report period and a report offset of A-CSI reports on two frequency bands
  • a method for reporting CSI is described in detail as follow.
  • a downlink subframe on a downlink frequency band is referred to as a FDD-DL
  • an uplink subframe on an uplink frequency band for uplink transmission is referred to as a FDD-UL
  • a part of uplink subframes changed to downlink subframe on an uplink frequency band is referred to as a FDD-UL-DL.
  • a method that a UE determines whether an A-CSI report is triggered on a FDD-UL and determines on which frequency band the CSI report is indicated to be triggered is provided according to an embodiment of the present invention.
  • an eNB transmits a corresponding PDCCH on a first nsubframe for performing scheduling.
  • k is equal to 4.
  • a CSI request field of a DCI format on the PDCCH carrying information of scheduling the PUSCH determines whether the UE triggers the A-CSI report on the PUSCH.
  • whether a random access request is received determines whether the UE triggers the A-CSI report on the PUSCH.
  • the UE determines whether an A-CSI report is triggered on the PUSCH according to a CSI request field carried ona DCI format 0 or a DCI format 4 on the PDCCH.
  • downlink data may be transmitted on two carries.
  • CSI reported on downlink subframes of two carriers is fed back.
  • a frequency band corresponding to the CSI of the A-CSI report is indicated, i.e., it is distinguished whether the CSI on the FDD-DL or the CSI on the FDD-UL-DL is triggered.
  • an UL-Grant may be respectively transmitted on the FDD-DL and FDD-UL-DL.
  • the frequency band is determinedaccording to the frequency on which the UL-Grant is received by the UE. For example, when receiving the UL-Grant on the FDD-DL for indicating to trigger the A-CSI report, the UE reports the CSI on the FDD-DL.
  • the UE When receiving the UL-Grant on the FDD-UL-DL for indicating to trigger the A-CSI report, the UE reports the CSI on the FDD-UL-DL.
  • the eNB transmits a corresponding UL-Grant on the FDD-DL.
  • the frequency band of the CSI report is indicated through an information field of the UL-Grant.
  • the frequency band of the triggered A-CSI report is indicated through a bit information indicator added into the UL-Grant.
  • a bit value 0 indicates that the CSI on the FDD-DL is triggered
  • a bit value 1 indicates the CSI on the FDD-UL-DL is triggered.
  • a frequency band of the A-CSI report is indicated by multiplexing a current information field.
  • FIG. 3 is a flowchart illustrating a method for indicating an A-CSI report based on an unused code in a CIF field according to an embodiment of the present invention.
  • a frequency band of CSI of the A-CSI report on the PUSCH is indicated according to high layer configuration or broadcasting information.
  • the A-CSI report of the FDD-DL is notified to the UE through a high layer semi-static configuration, broadcasting information, a physical layer signaling, or a RRC layer signaling.
  • a frequency band of CSI of an A-CSI report on a PUSCH is indicated according to a downlink proportion or a priority indicator of downlink services on two frequency bands. For example, in the flexible FDD system, an entire downlink frequency band is used for downlink transmission. In order to ensure effectiveness of transmission on a downlink subframeof the downlink frequency band in the flexible FDD system, the UE reports the CSI of the downlink subframe on the PUSCH in the flexible FDD system.
  • the UE selects CSI of the A-CSI report on the FDD-UL-DL to be reported on the PUSCH.
  • a frequency band of CSI of an A-CSI report on a PUSCH is indicated according to a CSI request field of the received DCI format 0 or thereceived DCI format 4 for scheduling the PUSCH.
  • a method for indicating and displaying a CSI request field in a condition of configuring a signal flexible cell for a UE and a method for indicating and displaying a CSI request field in a condition of configuring multiple flexible cells for a UE are respectively represented as follows.
  • a flexible FDD cell is configured for the UE.
  • a frequency band of the FDD-DL and a frequency band of the FDD-UL-DL are respectively considered as a same cell.
  • the CSI request field includes 2 bits. Codes "01", “10” and "11" of the FDD-DL and FDD-UL-DL indicates on which one or two frequency bands the A-CSI report is triggered, or a reserved code is not used.
  • the code “01” indicates that the CSI on the FDD-DL is triggered
  • the code “10” indicates that the CSI on the FDD-UL-DL is triggered
  • the code “11” indicates that trigger one or more pieces of CSI of one or more frequency bands are triggered by the high layer signaling, or "11" is reserved and is not used.
  • Table 4 represents a method for indicating a frequency band of an A-CSI report.
  • the code "01” indicates that the CSI on the FDD-DL is trigged.
  • Codes “10” and “11” indicate that the CSI is triggered on one or more frequency bands by higher layers.
  • Table 5 represents a method for indicating a frequency band of an A-CSI report.
  • Table 5 Value of CSI request field Description 00 NoA-CSI report is triggered 01 An A-CSI report for the FDD-DL is triggered 10 An A-CSI report is triggered for a frequency band configured by high layers 11 An A-CSI report is triggered for a frequency band configured by high layers
  • a frequency band of the FDD-DL and a frequency band of the FDD-UL-DL are taken as a same cell, i.e., the UE works on a CA mode.
  • "01" may be defined to trigger CSI of the FDD-DL of the flexible cell, or may be defined to trigger CSI of the FDD-DL and the FDD-UL-DL of the flexible cell.
  • "01" may be pre-defined or may be configured by higher layers.
  • “10” and “11” may be used to configure in which cell and on which frequency band the CSI is triggered by higher layers.
  • Table 6 represents a method for indicating an A-CSI report.
  • the UE is configured with a serving cell and configured in the transmission mode TM10 by the high layers, or the UE is configured with more than one serving cell and configured in the transmission mode TM10 by the high layers.
  • "01" is defined to trigger the A-CSI report of a CSI process of the FDD-DL of the flexible FDD cell, or is defined to trigger the A-CSI report of a CSI process of the FDD-DL and the FDD-UL-DL of the flexible FDD cell.
  • "01” may be configured by higher layers”10" and "11" may be used to configure in which cell or on which frequency band the CSI process is triggered by higher layers
  • Table 7 represents a method for indicating a frequency band of an A-CSI report.
  • the CSI request field indicates that a CSI of a certain CSI subframe set is triggered.
  • a CSI subframe set of a CSI process is defined.
  • "01" may be defined to trigger the A-CSI report of a CSI process of the FDD-DL of the flexible FDD cell, or may be defined to trigger the A-CSI report of a CSI process of the FDD-DL and the FDD-UL-DL of the flexible FDD cell.
  • Table 8 represents a method for indicating a frequency band of an A-CSI report.
  • the CSI request field with 1 bit may be processed similarly as "01" of the CSI request field with 2 bit.
  • "1" may be defined to trigger an A-CSI report of the FDD-DL of the flexible cell, or may be defined to trigger an A-CSI report of the FDD-DL and the FDD-UL-DL of the flexible cell at the same time.
  • "1" may be pre-defined, or may be configured by higher layersIt is assumed that two frequency bands of a flexible FDD cell, i.e., the FDD-DL and the FDD-UL-DL are taken as two independent cells, and the UE works in a CA mode.
  • a cell corresponding to the FDD-DL is a 1st set of serving cells
  • a cell corresponding to the FDD-UL-DL is a 2nd set of the serving cells.
  • "01" may be defined to trigger the A-CSI report of the1st set of the serving cells or may be defined to trigger the A-CSI report of the2nd set of the serving cells at the same time.
  • "01” may be pre-defined, or may be configured by higher layers.
  • "10” or “11” may be configured to trigger CSI of a cell corresponding to the FDD-DL and a cell corresponding to the FDD-UL-DL.
  • Table 9 represents a method for indicating a frequency band of an A-CSI report.
  • Table 9 Value of CSI request field Description 00 No A-CSI report is triggered 01 An A-CSI report of a serving cell c is triggered 10 An A-CSI report is triggered for 1st set of serving cells configured by high layers 11 An A-CSI report is triggered for 2st set of serving cells configured by high layers
  • a FDD-DL and a FDD-UL-DL of each flexible FDD cell are respectively taken as two independent cells, and the UE works in a CA mode.
  • a cell group including cells corresponding to FDD-DLs of the multiple flexible FDD cells is defined as a 1st set of the serving cell
  • a cell group including cells corresponding to FDD-UL-DLs of the multiple flexible FDD cells is defined as a 2nd set of the serving cell.
  • "01" may be defined to trigger the A-CSI report of a cell in a 1st set of the serving cell or may be defined to trigger the A-CSI report of a cell in a 1st set of the serving cell and the A-CSI report of a cell in a 2nd set of the serving cell at the same time.
  • "01” may be pre-defined, or may be configured by the higher layers.
  • "10” or “11” may be configured to trigger CSI of a cell corresponding to a FDD-DL and CSI of a cell corresponding to a FDD-UL-DL.
  • Table 10 represents a method for indicating a frequency band of an A-CSI report.
  • a method that a UE determines whether an A-CSI report is triggered on a FDD-UL and determines on which frequency band the CSI report is indicated to be triggered is provided according to an embodiment of the present invention.
  • broadcasting information a physical layer signaling, or a RRC layer message
  • a downlink proportion of two frequency bands a priority characteristic of a downlink service and a CSI request field of the received PDCCH, it is indicated whether an A-CSI report is indicated and on which frequency band the A-CSI report is triggered.
  • a UE when CSI on a FDD-DL and CSI on a FDD-UL-DL are reported through an A-CSI report on a same FDD-UL, in case of collision between a CSI report of a FDD-DL and a CSI report of a FDD-UL-DL, a UE selects a frequency band corresponding to the A-CSI report to be performed.
  • the A-CSI report is carried on the PUSCH. It is assumed an uplink scheduling request may be transmitted on a downlink subframe on any of two frequency bands to trigger a corresponding CSI report on the PUSCH.
  • a PUSCH resource configured by a high layer only can carry CSI of a frequency band
  • the UE selects on which frequency band the A-CSI report is performed according to a priority rule.
  • FIG. 7 is a flowchart illustrating a method for selecting a frequency band to perform an A-CSI report when the A-CSI is performed according to an embodiment of the present invention.
  • the method includes procedures as follows.
  • a UE receives information of a CSI report.
  • the CSI report information is carried in at least one of a PDCCH message of scheduling a PUSCH, a configuration message, a physical signaling, and a RRC layer signaling.
  • the information of the CSI report may include a frequency band of the CSI report, a report type of the CSI report, a report mode of the CSI report, a CSI process of the CSI report, and a cell carrier or a CSI subframe set corresponding to the CSI report.
  • the UE selects a frequency band corresponding to the A-CSI report according to the priority rule.
  • a flexible FDD cell is respectively taken as a cell or two cells as follows.
  • the UE determines on which frequency band the A-CSI report is selected to be performed according to the priority rule.
  • the frequency band corresponding to the A-CSI report on the PUSCH is indicated according to high layer configuration or broadcasting information.
  • the CSI request field is "1”, “01”, “10”, or "11”
  • the UE is notified on which frequency band corresponding to the A-CSI report on PUSCH of the LTE FDD system the A-CSI report is performed according to higher layers configuration or broadcasting information.
  • a frequency band corresponding to an A-CSI report on the PUSCH is indicated according to a downlink proportion or priorities of downlink services of two frequencies. For example, when a priority of the FDD-DL is higher than a priority of the FDD-UL-DL, the UE selects CSI of the FDD-DL subframe to be reported through the A-CSI report on the PUSCH.
  • a frequency band corresponding to an A-CSI report on the PUSCH is indicated according to a priority of an A-CSI report mode of each frequency band configured by a high layer.
  • there are three report modes for the A-CSI report respectively corresponding to a wide-band CQI report, a sub-band CQI reported selected by the UE and a sub-band CQI configured by the high layer.
  • reported modes of the PMI are distinguished, there are five different report modes. Different transmission mode may support different report modes. The different report modes correspond to different performance object requirement.
  • the UE may perform a CSI report according to priorities of different report modes.
  • the UE selects that the A-CSI report performed on the PUSCH is the CSI on the FDD-UL-DL.
  • a priority rule is determined according to a priority of a CSI process corresponding CSI measurement.
  • Multiple CSI processes are configured by the high layer.
  • a TM10 transmission mode is configured by the high layer for the UE, the UE measures and reports information of multiple pieces of CSI of multiple CSI processes.
  • a priority of a 1st set of CSI process is higher than a priority of a 2nd set of the CSI processes.
  • the high layer configures that a process on the FDD-DL is the 1st set of the CSI processes, and a process on the FDD-UL-DL is the 2nd set of the CSI processes.
  • the UE selects to report the information of the CSI corresponding to the 1stset of the CSI processes on the FDD-DL.
  • a frequency band corresponding to an A-CSI report on the PUSCH is indicated according to priorities of respective report modes of respective A-CSI reports configured by the high layer and priorities of respective frequency bands.
  • the UE firstly compares priorities of report modes of A-CSI reports of respective two frequency bands. When the priorities of report modes of the respective two frequency bands are same, the frequency band corresponding to the A-CSI report is determined according to a relationship of priorities of frequencies or carriers configured by the high layers.
  • the UE selects the CSI on the FDD-DL to be reported.
  • a frequency band corresponding to an A-CSI report on the PUSCH is indicated according to a priority of a report mode of an A-CSI report configured by the high layer, and a CSI process index and a priority of a frequency band.
  • multiple CSI processes are configured for the UE by the high layer.
  • the UE reports information of CSI for the multiple CSI processes.
  • the frequency band corresponding to the A-CSI report is determined by the UE according to the priorities of the report modes of the A-CSI reports. When the two frequency bands have a same report mode, CSI process indexes are compared.
  • the frequency band corresponding to the A-CSI report is determined according to the priorities of the frequency bands. For example, a priority of the FDD-DL is higher than a priority of the FDD-UL-DL.
  • Table 11 defines a method of a priority of an A-CSI report.
  • the UE When multiple cells are configured for a UE by the high layer, the UE works in a CA mode. For two A-CSI reports conflicting with each other, the UE performs determination of the frequency band corresponding to the A-CSI report according to priorities of report modes of the A-CSI reports configured by the high layer. For a given FDD-UL subframe, in the case of collision between the A-CSI reports with the report modes of the same priority, CSI process indexes are compared. For a given FDD-UL subframe, in the case of collision between the P-CSI reports with the CSI process indexes of the same priority, carrier indexes are compared.
  • the UE When collision occurs among different frequency bands in a same flexible cell, the UE performs determination of the frequency band corresponding to the A-CSI report according to priorities of the different frequency bands in the flexible cell. For example, a priority of the FDD-DL is higher than a priority of the FDD-UL-DL.
  • Table 12 defines a method of a priority of an A-CSI report.
  • Table 13 defines another method of a priority of an A-CSI report.
  • the UE For A-CSI reports conflicting with each other, the UE firstly performs determination of the frequency band corresponding to the A-CSI report according to priorities of report modes of the A-CSI reports configured by the high layer. For a given FDD-UL subframe, in the case of collision between the P-CSI reports with the report modes of the same priority, CSI process indexes are compared. For a given FDD-UL subframe, in the case of collision between the A-CSI reports with CSI process indexes of the same priority, the frequency band corresponding to the A-CSI report is determined according to priorities of different frequency bands in a flexible cell. When the priorities of the different frequency bands are same, carrier indexes are compared.
  • a FDD-DL index is 0, and a FDD-UL frequency band index is 1.
  • a priority of a frequency band 0 is higher than a priority of a frequency band 1.
  • a frequency band index may be pre-defined for a FDD cell or TDD cell working in a traditional work way. For example, a frequency band is fixedly processed in accordance with a frequency band 0.
  • a UE works in a CA mode.
  • a cell corresponding to a FDD-DL is a first category cell or a component carrier (CC) #0 and a cell corresponding to a FDD-UL-DL is a second category cell or a CC #1.
  • a priority rule of A-CSI reports conflicting with each other may be same as that used at present to perform determination.
  • the UE may firstly perform determination according to the priorities of report modes of various cells configured by the high layer. For a given FDD-UL subframe, in the case of collision between the A-CSI reports with report modes of the same priority, cell carrier indexes are compared.
  • Table 14 represents a method for defining a priority rule.
  • the UE When multiple CSI processes is configured for the UE by the high layer, the UE reports information of CSI of the multiple CSI processes. For the A-CSI reports conflicting with each other, the UE firstly performs determination of the frequency band corresponding to the A-CSI report according to report modes of the A-CSI reports configured by the high layer. For a given FDD-UL subframe, in the case of collision between the P-CSI reports with the report modes of the same priority, CSI process indexes are compared. For a given FDD-UL subframe, in the case of collision between the A-CSI reports with CSI process indexes of the same priority, determination is performed according to carrier indexes of cells. Table 15 represents a method for defining a priority rule.
  • a process according to embodiment 2 finishes.
  • the UE selects on which frequency band the CSI is reported according to a priority rule indicated by high layer configuration, a physical signaling, or a RRC layer signaling.
  • the priority rule may be in accordance with priorities of a frequency bands, or in accordance with priorities of downlink services respectively transmitted on two frequency bands.
  • the high layer may configure a priority rule of a flexible rule.
  • the frequency band on which the CSI is reported may be determined according to a priority of a report mode of an A-CSI report, a priority of a CSI process index corresponding to an A-CSI report configured by the high layer, a report mode, a CSI process index and a priority of a frequency band.
  • the priority rule is determined according to a priority of a carrier index.
  • the frequency band corresponding to the A-CSI report is determined according to a report mode of a CSI report, a CSI process index and carrier indexes of different cells.
  • a UE when CSI of a FDD-DL and CSI of a FDD-UL-DL are reported respectively through an A-CSI report in a same FDD-UL subframe, a UE reports CSI of at least one frequency band.
  • an A-CSI report is carried in a PUSCH.
  • the UE transmits CSI of different downlink carriers on the uplink subframe.
  • an uplink scheduling request may be transmitted on a FDD-DL or a FDD-UL-DL to trigger an A-CSI report on the PUSCH.
  • PUSCH resources configured by the high layer may carry entire or a part of CSI of two frequency bands or two carries, the UE may select at least one piece of CSI of the two frequency bands to be reported.
  • the CSI reported by the UE may include a CQI, a PMI and a RI.
  • the high layer may configure the UE to report all or a part of the three kinds of information above in a PUSCH resource, which may be determined according to PUSCH resources configured by the high layer/uplink information capacity, and the number of bits of information of the CSI report, which may further be determined according to a priority of a report mode of the CSI report of the frequency band.
  • FIG. 8 is a flowchart illustrating a method for selecting a part of CSI reports of frequency bands when an A-CSI report is performed. The method includes procedures as follows.
  • a UE receives information of a CSI report.
  • the CSI report information is carried in at least one of a PDCCH message of scheduling a PUSCH, a configuration message, and/or a physical signaling and a RRC layer signaling.
  • the information of the CSI report may include at least one of a frequency band of the CSI report, a report type of the CSI report, a report modeof the CSI report, a CSI process of the CSI report, a cell carrier or a CSI subframe set of the CSI report.
  • the UE calculates the number of bits of information of the CSI report of each frequency band, and determines CSI to be reported according to a relationship between the number of the bits of the information and uplink capacity, and/or a configured priority relationship of CSI reports.
  • the priority relationship of the CSI reports may include a priority relationship determined according to frequency bands corresponding to the CSI. For example, the CSI of the FDD-DL belongs to a first priority, and the CSI of the FDD-UL-DL belongs to a second priority.
  • the priority relationship of the CSI reports may further include a priority relationship that is configured through a high layer in a semi-static way and is determined according to services respectively transmitted on uplink or downlink on two frequency bands.
  • the priority relationship of the CSI reports may further include a priority relationship determined according to the report mode of the CSI report.
  • a priority relationship may include that a RI belongs to the first priority, a wide-band CQI/PMI belongs to the second priority, a sub-band COI information belongs to a third priority.
  • the priorities are shown in Table 16.
  • the priority relationship above may be configured through a high layer, or may be pre-defined.
  • a priority relationship list is pre-defined. The UE determines the corresponding CSI report by looking up the priority relationship list.
  • a first method according to the priority relationship determined based on frequency bands e.g., a priority of the FDD-DL is higher than a priority of the FDD-UL-DL, the UE performs the CSI report.
  • the UE According to content of information of the CSI report configured by the high layer, the UE respectively calculates the numbers of the bits of information of the CSI of two frequency bands (the FDD-DL and the FDD-UL-DL).
  • the numbers of the bits of the information of the CQI/PMI carried respectively through different report modes are different.
  • the number of the bits of the information of the CQI/PMI is determined by a transmission mode, an antenna port and rank information configured through the high layer. For example, for a transmission mode 4, a transmission mode 6, or a transmission mode 8 configured by the high layer to perform PMI/RI feedback, the UE performs a corresponding wide-band CQI report.
  • the number of bits of the information of the CQI/PMI is shown in Table 17.
  • the numbers of bits of information corresponding to the CQI/PMI may be different for different transmission modes, different antenna ports and different rank information.
  • the corresponding CQI/PMI is carried on at least one of an uplink PUSCH, uplink data, a HARQ-ACK and a RI to perform duplex transmission.
  • the tree categories of control information (CQI/PMI, HARQ-ACK, RI) are respectively coded and modulated.
  • the UE calculates the corresponding number of bits of information of the CQI/PMI according to the report mode, and then calculates the number of bits after a coding process and a modulating process are performed:
  • L is the number of bits of a Cyclical Redundancy Check (CRC), thus, the number of bits of information of the CQI/PMI is , wherein is a modulation mode corresponding to a transmission code.
  • CRC Cyclical Redundancy Check
  • the number of modulation symbols occupied by the uplink data is , wherein represents the number of layers of a corresponding transmission code. is a transmission bandwidth of the PUSCH scheduled in a current subframe. is the number of OFDM symbols in the current subframe, a value is equal to , wherein is equal to 0 or 1, or determined according to SRS configuration.
  • the UE may calculate the number of bits of information carried in the CQI/PMI through the formula above.
  • the capacity of the uplink physical channel may be the number of bits that is carried in maximum uplink control information able to be carried in the uplink physical channel and is configured by the high layer, e.g., the maximum capacity supported by a PUCCH format 3 is 22 bits. Sum of the numbers of bits of respective two frequency bands is not more than the capacity of the uplink channel.
  • the UE may perform duplex transmission on the PUSCH of a FDD-UL subframe to carry pieces of CSI of respective two frequency bands.
  • the UE may preferably report the CSI of the FDD-DL, and may discard the CSI of the FDD-UL-DL.
  • the UE may preferably report the CSI of the FDD- DL, and may report information of the CSI of the FDD-UL-DL with a high priority in remained capacity.
  • the RI is configured to be reported by the high layer and the number of the bits of RI in the CSI of the FDD-DL and the number of the bits of the CSI of RI in the FDD-UL-DL is respectively not more than the capacity of the physical uplink channel.
  • related information of downlink transmission of the current frequency band is used as information such as MCS, PMI for downlink transmission on a corresponding frequency band to be scheduled by an eNB next time.
  • the UE may report information in the CSI of the FDD-DL with a high priority, e.g., RI or wide-band CQI, and may discard the CSI of the FDD-UL-DL.
  • a high priority e.g., RI or wide-band CQI
  • related information of downlink transmission of the current frequency band is used as information such as MCS, PMI for downlink transmission on a corresponding frequency band to be scheduled by an eNB next time.
  • a second method according to a priority determined based on a report mode of the CSI report, the UE performs the CSI report.
  • the UE According to content of information of the CSI report configured by the high layer, the UE respectively calculates the numbers of bits of two frequency bands (the FDD-DL and the FDD-UL-DL).
  • the UE may carry the CSI of the respective two frequency bands on the PUSCH of the FDD-UL at the same time to perform duplex transmission.
  • the UE When the numbers of the bits of the two frequency bands are respectively less than the capacity of the uplink physical channel and the sum of the numbers of the bits of the two frequency bands is more than the capacity of the physical uplink channel, according to a priority relationship, the UE firstly reports the CSI of a frequency band with a highest priority.
  • the high layer configures that the CSI of the FDD-DL is configured with a sub-band CQI, and the CSI of the FDD-UL-DL is configured with a RI and a wide-band CQI.
  • the UE may preferably report the CSI of the FDD-UL-DL, and discards the CSI of the FDD-DL.
  • the UE may report the CSI of the FDD-UL-DL, and may report information with a high priority in the CSI in remained capacity.
  • related information of downlink transmission of the current frequency band is used as information such as MCS, PMI for downlink transmission on a corresponding frequency band to be scheduled by an eNB next time.
  • the UE may report information with a high priority of the CSI of the FDD-DL, e.g., the RI and the wide-band CQI, and may discard the CSI of the FDD-UL-DL.
  • information with a high priority of the CSI of the FDD-DL e.g., the RI and the wide-band CQI
  • the UE may report information with a high priority of the CSI of the FDD-DL, e.g., the RI and the wide-band CQI, and may discard the CSI of the FDD-UL-DL.
  • related information of downlink transmission of the current frequency band is used as information such as MCS, PMI for downlink transmission on a corresponding frequency band to be scheduled by an eNB next time.
  • a same subframe PUSCH carries the CSI of the two frequency bands.
  • the UE reports entire CSI or a part of the CSI of a frequency band or reports entire CSI or a part of the CSI of the two frequency bands.
  • the P-CSI report is carried on a PUCCH.
  • a CSI of a downlink carrier is transmitted on the uplink subframe.
  • the P-CSI report including the RI and CQI/PMI is configured for a single frequency band.
  • the high layer may configure a configuration parameter ri-ConfigIndex(I RI ) to determine a period MRI and an offset NOFFSET,RI for the UE to perform the RI report.
  • the high layer may configure a configuration parameter cqi-pmi-ConfigIndex(I CQI/PMI ) to determine a period N pd and an offset N OFFSET,CQI for the UE to perform the CQI/PMI report.
  • a flexible LTE FDD system i.e., downlink transmission can be performed on at least one of the FDD-DL and the FDD-UL-DL
  • report periods and report offsets of RI reports and CQI/PMI reports of two frequency bands are respectively configured on a FDD-UL.
  • the UE determine which frequency band is for the P-CSI report to be transmitted according to a priority rule.
  • the priority rule is defined as follows in two conditions respectively that two frequency bands in a flexible FDD cell are taken as a same cell and that the two frequency bands in a flexible FDD cell are taken as two cells.
  • the priority rule is determined according to frequency bands. For example, it is defined that a priority of the FDD-DL is higher than a priority of the FDD-UL-DL.
  • a priority relationship may be semi-statically determined according to high layer semi-static configuration, or may be configured through a physical layer signaling, a RRC layer signaling or broadcasting information.
  • a priority rule is determined according to a downlink proportion or priorities of downlink services of the two frequency bands. For example, the entire downlink frequency band of a flexible FDD is used for downlink transmission. In order to ensure effectiveness of transmission on a downlink subframe of the downlink frequency band, the UE reports the CSI of the downlink subframe of the flexible FDD system on the PUSCH. For example, when the priority of a service carried on the FDD-UL-DL is higher than that on the FDD-DL subframe, the UE perform selection to report CSI of the FDD-UL-DL on the PUSCH through the A-CSI report.
  • a priority rule is determined according to a CSI process of CSI measurement.
  • a CSI process of CSI measurement When multiple CSI processes are configured for the UE by the higher layers, e.g., a transmission mode TM10 is configured for the UE by the higher layers, the UE respectively measures and reports CSI of the multiple CSI processes. For example, it is defined that a priority of a 1st set of CSI process is higher than a priority of a 2nd set of CSI process.
  • UE perform selection to perform the CSI of the FDD-DL.
  • a report mode 1-0 represents there is a wide-band CQI and there is not a PMI
  • a report mode 1-1 represents there is a wide-band CQI of a single PMI
  • a report mode 2-0 represents there is a sub-band CQI and there is not a PMI
  • a report mode 2-1 represents a sub-band CQI and a single PMI.
  • ten report types are defined in the specification as shown in Table 16.
  • Report types supported by different report modes may be different.
  • the report mode 1-0 includes report types (3,4)
  • the report mode 1-1 includes report types (3,5,2,2b,2c)
  • the report mode 2-0 includes report types (1,3,4)
  • the report mode 2-1 includes report types (1,1a,2,2a,2b,3,6).
  • the priority rule is determined according to report modes configured by the high layer or priorities of report types.
  • it is defined that when the UE is configured in a cell and CSI report types (3, 5, 6) of the UE in a serving cell c configured by the high layer is mapped onto a same uplink subframe with UE report types (1,1a,2,2a,2b,2c,4) in the serving cell c, the priority of the report types (3, 5, 6) is higher than the priority of the report types (1,1a,2,2a,2b,2c,4).
  • the CSI with a lowest CSI process index has a high priority.
  • the priority rule is determined according to report types of the respective FDD-DL and the FDD-UL-DL configured by the high layer or priorities of CSI process indexes. For example, when the RI of the FDD-DL (the report type 3) and the wide band CQI of the FDD-UL (the report type 4) is configured to be reported by the high layer, the UE preferably perform the P-CSI report of the FDD-DL.
  • the high layer configures that a CSI process index of the CSI measurement for the FDD-DL is taken as a 1st set ofthe CSI processes, and a CSI process index of the CSI measurement for the FDD-UL-DL is taken as a 2nd set ofthe CSI processes.
  • the UE preferably perform the 1st set of CSI process, i.e., the P-CSI report of the FDD-DL frequency.
  • a frequency band of a flexible cell is indicated through a CSI process index.
  • a priority may be directly defined according to an index of a frequency band corresponding to a CSI report.
  • the UE firstly performs determination according to priority of report types of P-CSI reports configured by the high layer. For a given FDD-UL subframe, in the case of collision between the P-CSI reports with report types of the same priority, the UE performs the determination according to priorities of different frequency bands in the flexible FDD cell, e.g., the priority of the FDD-DL is higher than the priority of the FDD-UL-DL.
  • priorities rules may be distinguished according to CSI processes. For a given FDD-UL subframe, in the case of collision between the P-CSI reports with two frequency bands of the same priority, CSI process indexes may be compared. When multiple CSI processes are configured for the UE by the high layer and the CSI process indexes of the two frequency bands are same, priorities rules may be distinguished according to priorities of frequency bands, i.e., the priority of the FDD-DL is higher than the priority of the FDD-UL-DL. Table 19 represents a method for defining a priority rule.
  • the priorities are different for different report modes.
  • a report mode 1-0 represents there is a wide-band CQI and there is not a PMI
  • a report mode 1-1 represents there is a wide-band CQI of a single PMI. It may be defined that a priority of the report mode 1-0 is higher than a priority of the report mode 1-1, a priority of the report mode 1-1 is higher than a priority of the report mode 2-0, a priority of the report mode 2-0 is higher than a priority of the report mode 2-1.
  • the UE may perform determination of the frequency band corresponding to the P-CSI report according to priorities of report modes of the P-CSI reports configured by the high layer.
  • CSI process indexes are compared.
  • the UE performs determination according to priorities of different frequency bands of the flexible FDD cell, e.g., the priority of the FDD-DL is higher than the priority of the FDD-UL-DL.
  • Table 20 represents a method for defining a priority rule.
  • a priority rule may be determined by combining priority rules above.
  • Table 21 represents a method for defining a priority rule.
  • the UE performs determination according to priorities of the report types of the P-CSI reports configured by the high layer. For a given FDD-UL subframe, in the case of collision between the P-CSI reports with the report types of the same priority, priorities of the report modes configured by the high layer are compared. For a given FDD-UL subframe, in the case of collision between the P-CSI reports with the report modes of the same priority, the CSI process indexes are compared.
  • the UE performs determination according to priorities of different frequency bands of the flexible cell, e.g., the priority of the FDD-DL is higher than the priority of the FDD-UL-DL.
  • UE performs determination according to carrier indexes.
  • a P-CSI report of a frequency band with a less carrier index has a higher priority.
  • the CSI process indexes may be compared, the CSI process with a higher CSI process index has a higher priority.
  • the UE performs determination according to priorities of report types of P-CSI reports configured by the high layer.
  • the CSI process indexes are compared.
  • the carrier indexes are compared.
  • frequency bands are compared. According to priorities of the frequency bands, the UE performs the determination, e.g., the priority of the FDD-DL is higher than the priority of the FDD-UL-DL.
  • Table 22 represents a method for defining a priority rule.
  • Table 23 represents a method for defining a priority rule.
  • the UE performs determination according to report types of the P-CSI reports configured by the high layer.
  • the report types are same, the CSI process indexes are compared.
  • the frequency bands are compared.
  • carrier indexes are compared. For example, a FDD-DL index is 0, and a FDD-UL index is 1.
  • a priority of a frequency band 0 is higher than a priority of a frequency band 1.
  • an index of a used frequency band may be pre-defined, e.g., the used frequency band can be fixedly processed as a frequency band 0.
  • Table 24 represents a method for defining a priority rule.
  • the UE performs determination according to report modes of the P-CSI reports configured by the high layer.
  • the report modes are same.
  • the CSI process indexes are same, the carrier indexes are compared.
  • the frequency bands are compared. The UE performs determination according to priorities of the frequency bands. For example, the priority of the FDD-DL is higher than the priority of the FDD-UL-DL.
  • Table 25 represents a method for defining a priority rule.
  • the UE performs determination according to report modes of the P-CSI reports configured by the high layer.
  • the report modes are same, the CSI process indexes are compared.
  • the frequency bands are compared.
  • the carrier indexes are compared. For example, the FDD-DL index is 0, and the FDD-UL-DL index is 1.
  • an index of a used frequency band may be pre-defined, e.g., the used frequency band can be fixedly processed as a frequency band 0.
  • Table 26 represents a method for defining a priority rule.
  • the UE performs determination according to priorities of report types of the P-CSI reports configured by the high layer.
  • the report modes of the P-CSI reports of the two frequency bands are compared.
  • the CSI process indexes are compared.
  • the frequency bands are compared.
  • the carrier indexes are compared. For example, the FDD-DL index is 0, and the FDD-UL-DL index is 1.
  • Table 27 represents a method for defining a priority rule.
  • the UE performs determination according to priorities of report types of the P-CSI reports configured by the high layer.
  • the report modes of the P-CSI reports of the two frequency bands are compared.
  • the CSI process indexes are compared.
  • carrier indexes are compared.
  • the frequency bands are compared. For example, the priority of the FDD-DL is higher than the priority of the FDD-UL-DL.
  • Table 28 represents a method for defining a priority rule.
  • the UE performs determination according to priorities of report types of the P-CSI reports configured by the high layer.
  • the report modes are compared.
  • the CSI process indexes are compared.
  • carrier indexes are compared.
  • indexes of CSI subframe sets are compared.
  • the frequency bands are compared. For example, the priority of the FDD-DL is higher than the priority of the FDD-UL-DL.
  • Table 29 represents a method for defining a priority rule.
  • the UE performs determination according to priorities of report types of the P-CSI reports configured by the high layer.
  • report modes are compared.
  • the CSI process indexes are compared.
  • carrier indexes are compared.
  • the frequency bands are compared. For example, the priority of the FDD-DL is higher than the priority of the FDD-UL-DL.
  • the two frequency bands of the flexible FDD cell are taken as two cells, and the UE works in a CA mode.
  • a flexible FDD cell is configured for the UE, and the UE may work in a CA system including two cells.
  • the two cells herein refer to the FDD-DL of the flexible FDD cell and the FDD-UL of the flexible FDD cell. It may be defined hat a cell corresponding to the FDD-DL is CC#0, e.g., Pcell, a cell corresponding to the FDD-UL is CC#1, or a carrier index corresponding to the FDD-UL is configured through the high layer signaling. It is assumed that multiple cells are configured for the UE, which includes at least one flexible FDD cell. The UE may work in a CA system including multiple cells.
  • Each of the FDD-DL and the FDD-UL of each flexible FDD cell is processed as a cell.
  • carrier indexes corresponding to the FDD-DL and the FDD-UL may be respectively defined through a high layer signaling, or a carrier index of a cell corresponding to the FDD-DL is configured as k through the high layers, a carrier index of a cell corresponding to the FDD-UL-DL is configured as k+1 through the high layers.
  • priorities may be determined according to a current priority rule.
  • the UE performs determination according to a priority of a report type of each cell configured by the high layer.
  • priorities of the report types of the two cells are same, the CSI process indexes are compared.
  • carrier indexes are compared.
  • Table 30 represents a method for defining a priority rule.
  • Table 31 represents another method for defining a priority rule.
  • a current priority rule may be still used as a priority for performing determination.
  • the high layer configures the UE to work in a CA mode, and configures multiple cells and multiple CSI processes for the UE.
  • the UE performs the determination according to a priority of a report type of each cell configured by the high layer.
  • report modes of the P-CSI reports are compared.
  • the CSI process indexes are compared.
  • carrier indexes are compared.
  • a process of embodiment 4 finishes.
  • the UE determines a report way of a P-CSI report according to a priority rule.
  • a priority rule may be determined according to a priority relationship determined through high layer semi-static configuration, a physical layer signaling or a RRC layer signaling.
  • a priority rule may be determined according to a downlink proportion or a priority relation of downlink services of the two frequency bands.
  • a priority rule may be determined according to priorities of report types of the two frequency bands configured by the high layer.
  • a priority rule may be determined according to priorities of report modes of the two frequency bands configured by the high layer.
  • a priority rule may be determined according to priorities of CSI processes of the two frequency bands configured by the high layer.
  • a priority rule may be determined according to priorities of the two frequency bands in a same flexible FDD cell.
  • a priority rule may be determined according to a priority of a carrier index, and may be further determined according to a report type of a P-CSI report, a report mode of a P-CSI report, a process index, a carrier index, an index of a CSI subframe index and combination of priorities of one or more frequency bands of the flexible FDD cell.
  • a method for determining a priority rule is same as that in a current prior art.
  • the priority rule may be determined according to priorities of report types of different cells configured by the high layer, or may be determined according to priorities of CSI process indexes of different cells configured by the high layers, or may be determined according to priorities carriers of different cells.
  • a method includes that uplink subframes and downlink subframes are assigned in a 10ms period.
  • the method is consistent with a 10ms subframe in a current LTE system, so as to simplify related standard and reduce UE complexity.
  • a structure of the 10ms subframe still adopts current TDD uplink-downlink time slot configurations 0-6 which limits most available uplink subframes in the frequency band.
  • the number of uplink time slots on the frequency band may be increased.
  • HARQ Round Trip Time in a current LTE FDD system is 8ms, in order to matching with the HARQ RTT in the LTE FDD system, in a method for assigning uplink subframes and downlink subframes of a FDD uplink frequency band, a 8ms period may be adopted to perform assignment.
  • FIG. 9 is a schematic diagram illustrating a possible uplink-downlink time slot configuration according to an embodiment of the present invention.
  • a design rule of the configuration is that the downlink time slots or the uplink time slots are consecutively assigned as much as possible, and a transition between an uplink subframe and a downlink subframe is decreased as much as possible.
  • a P-CSI report is carried in the PUCCH.
  • the P-CSI report of the RI and the CQI/PMI is configured for a single frequency band, wherein determination is performed by configuring a configuration parameter ri-ConfigIndex(I RI )through a high layer.
  • a configuration period MRI and an offset N OFFSET,RI are configured for the RI report.
  • Determination is performed by configuring a configuration parametercqi-pmi-ConfigIndex(I CQI/PMI ) by the high layer.
  • a configuration period N pd and an offset N OFFSET,CQI are configured for the CQI/PMI report.
  • the UE determines a subframe location of the CSI report by looking up a list.
  • a report period of the CQI/PMI is configured with 2/5/10/20/40/80/160.
  • a supported period may be 32/64/128.
  • a supported report period of the CQI/PMI is 1/5/10/20/40/80/160. Since a part of subframes of the uplink frequency band in the FDD system is used for downlink transmission, a previous timing relationship between an uplink frequency band and a downlink frequency band is not applied.
  • configuration of a period and an offset may be re-defined or modified.
  • a method for configuring a period and an offset of a P-CSI report is provided according to embodiment of the present invention.
  • FIG. 10 is a first schematic diagram illustrating a structure of a configuration of uplink time slots and downlink time slots according to an embodiment of the present invention.
  • n f is a number of a radio frame
  • ns is a number of a time slot of the radio frame
  • a number of a subframe of the radio frame is 1/3/5/7/9
  • a subframe 4/9 is a downlink subframe, and is not used for the CQI/PMI report.
  • a new method for configuring a period and an offset of a P-CSI report is provided.
  • Table 32 provides a possible configuration example. A period configuration of a periodic CQI/PMI report of a TDD structure may be adopted.
  • a configuration of a period 1 applies to TDD uplink-downlink configuration ⁇ 0,1,3,4,6 ⁇ , all uplink subframes may be used for the CQI/PMI report.
  • a process of the embodiment finishes.
  • a downlink frequency band of the FDD system adopts a 10ms subframe structure
  • a period configuration of a periodic CQI/PMI report of a TDD structure may be adopted.
  • a method for configuring a period and an offset of a P-CSI report is provided.
  • the uplink-downlink configuration in the uplink frequency band of the FDD system adopts a 8ms subframe structure
  • previous report periods of CQI/PMI configured in FDD e.g., a period that is equal 2, or a period that is not a multiple of 8
  • a new configuration rule may in accordance with a characteristic of a 8ms repeating period and a detail relationship of downlink time slots and uplink time slots.
  • a super frame includes 4 radio frames, and a radio frame includes 10 subframes.
  • a radio frame includes 10 subframes.
  • n f is a number of a radio subframe, i.e., a start subframe of a radio frame satisfying is aligned with a subframe 0 of a 8ms transition period.
  • the high layer configures ICQI/PMI by configuring the CQI/PMI report.
  • a subframe on which the UE performs a CSI report satisfies the following relationship:
  • n f is a number of the uplink subframe
  • ns is a number of a time slot of the uplink subframe.
  • Table 33 represents an example of a possible configuration method. For example, when a configuration of uplink time slots and downlink time slots of the uplink frequency band is as shown in FIG. 11, a CSI report method when the high layer configures that I CQI/PMI is equal to 2 is as follows.
  • a method for assigning CSI-RS resources is provided.
  • an assignment period of the CSI-RS is a multiple of 5ms.
  • An assignment method includes defining a new assignment period, e.g., the assignment period is a multiple of 4ms.
  • the high layer configures a subframe location of the CSI-RS with I CSI-RS .
  • a subframe on which the UE performs periodic measurement for the CSI-RS is satisfied a relationship as follows:
  • n f is a number of an uplink frame
  • n s is a number of a time slot of an uplink subframe.
  • Table 34 represents a possible method for assigning CSI-RS resources.
  • Table 34 Configuration of a subframe of CSI-RS I CSI-RS Configuration of a period of CSI-RS T CSI-RS (subframes) Configuration of a subframe offset of CSI-RS ⁇ CSI-RS (subframes) 0-3 4 I CSI-RS 4-11 8 I CSI-RS -4 12-27 16 I CSI-RS -12 28-59 32 I CSI-RS -28 60-123 64 I CSI-RS -60
  • various modules in the apparatus according to the present invention may be integrated in to a processing module, or may be separately deployed in independent physical modules.
  • two or more modules of the various modules may be integrated in to a module.
  • the integrated module above may be implemented in a hardware manner, or may be implemented in a manner of a software function module.
  • the integrated module can be stored in a computer readable storage medium.
  • the storage medium above can be a read-only memory, a disk or a CD.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil de remise d'un rapport d'informations d'état de canal (CSI). Au cours de ce procédé, un UE reçoit les informations d'un rapport de CSI, analyse les informations du rapport de CSI, et détermine la bande de fréquences de ce rapport de CSI, le type de rapport du rapport de CSI, le mode de rapport du rapport de CSI, le processus de CSI du rapport de CSI, une combinaison d'au moins un secteur de trame d'un ensemble de secteurs de trame de CSI et/ou des cellules, ainsi que la manière dont le rapport de CSI est remis. Grâce à ce procédé, lorsqu'une partie des secteurs de trame de liaison montante est occupée, la transmission du rapport de CSI de l'UE n'est pas affectée.
PCT/KR2015/004159 2014-04-28 2015-04-27 Procédé et appareil de remise d'un rapport d'informations d'état de canal WO2015167182A1 (fr)

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